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美国海岸线长达近3万英里,内河通海航道密布,又实行三海里领海制度,美国沿海安全管理相对较松。美国海军主力集中在诺福克、圣迭戈等少数港口或海外基地,
The coastline of the United States has a length of nearly 30,000 miles. The inland waterway is densely covered and the three-mile territorial waters system is implemented. The coastal safety management in the United States is relatively loose. The United States Navy mainly concentrated in Norfolk, San Diego and a few ports or overseas bases,